$4.95…because it has a gasket and O-ring molded into a single piece for drip-free seal. O-ring Gaskets for 1.5" pump and heater union tailpieces. Featuring a gasket and O-ring molded into a single piece. Design is superior to plain O-ring, for drip-free seal. 1-1/2" O-ring Gaskets Measures 2-3/8" O.D.…